<!DOCTYPE html>
<html lang="zh-CN">
<head>
    <meta charset="utf-8">
    <title>MapVGL</title>
    <meta http-equiv="X-UA-Compatible" content="IE=Edge">
    <meta name="viewport" content="initial-scale=1.0, user-scalable=no">
    <style>
    html,
    body {
        width: 100%;
        height: 100%;
        margin: 0;
        padding: 0;
    }
    #map_container {
        width: 100%;
        height: 100%;
        margin: 0;
    }
    </style>
    <script src="//api.map.baidu.com/api?v=1.0&type=webgl&ak=1XjLLEhZhQNUzd93EjU5nOGQ"></script>
    <script src="//mapv.baidu.com/build/mapv.min.js"></script>
    <script src="https://mapv.baidu.com/gl/examples/static/common.js"></script>
    <script src="https://code.bdstatic.com/npm/mapvgl@1.0.0-beta.119/dist/mapvgl.min.js"></script>
    <script src="https://code.bdstatic.com/npm/mapvgl@1.0.0-beta.119/dist/mapvgl.threelayers.min.js"></script>
</head>
<body>
    <div id="map_container"></div>
    <script>
    /* global BMapGL */

    /* global mapv */

    /* global mapvgl */

    /* global initMap */

    /* global purpleStyle */

    var map = initMap({
        tilt: 41.8,
        heading: 0,
        center: [105.552849,28.847593],
        zoom: 5,
        style: purpleStyle
    });

    var citys = [
        '北京', '天津', '上海', '重庆', '石家庄', '太原', '呼和浩特',
        '哈尔滨', '长春', '沈阳', '济南', '南京', '合肥', '杭州', '南昌', '福州',
        '郑州', '武汉', '长沙', '广州', '南宁', '西安', '银川', '兰州', '西宁',
        '乌鲁木齐', '成都', '贵阳', '昆明', '拉萨', '海口'
    ];

    var randomCount = 350; // 模拟的飞线的数量

    var curve = new mapvgl.BezierCurve();

    var data = [];

    // 构造数据
    while (randomCount--) {
        var startPoint = mapv.utilCityCenter.getCenterByCityName(citys[parseInt(Math.random() * citys.length, 10)]);
        var endPoint = mapv.utilCityCenter.getCenterByCityName(citys[parseInt(Math.random() * citys.length, 10)]);
        var length = 0;
        var startPoint = map.lnglatToMercator(startPoint.lng, startPoint.lat);
        var endPoint = map.lnglatToMercator(endPoint.lng, endPoint.lat);

        curve.setOptions({
            start: [startPoint[0], startPoint[1]],
            end: [endPoint[0], endPoint[1]]
        });
        var curveModelData = curve.getPoints(60);

        data.push({
            geometry: {
                type: 'LineString',
                coordinates: curveModelData
            },
            properties: {
                count: Math.random()
            }
        });
    }

    var view = new mapvgl.View({
        // postProcessing: new mapvgl.PostProcessing({
        //     passes: [{
        //         name: 'unrealBloom',
        //         threshold: 0.0,
        //         strength: 1.5,
        //         radius: 1.0
        //     }]
        // }),
        effects: [
            new mapvgl.BrightEffect({
                threshold: 0,
                blurSize: 2,
                clarity: 0.4
            }),
        ],
        map: map
    });

    var lineLayer = new mapvgl.LineTripLayer({
        color: 'rgb(255, 255, 204)', // 飞线动画颜色
        step: 0.3
    });
    view.addLayer(lineLayer);

    lineLayer.setData(data.map(item => {
        item.geometry.coordinates = item.geometry.coordinates.map(item => {
            item[2] += 3;
            return item;
        });
        return item;
    }));

    var lineLayer = new mapvgl.SimpleLineLayer({
        blend: 'lighter',
        color: 'rgb(255, 153, 0, 0.6)' // 飞线颜色
    });
    view.addLayer(lineLayer);
    lineLayer.setData(data);
    </script>
</body>
</html>
